“…Another set of studies investigating significant life experiences with the natural environment has focused on adult environmental activists or professionals (Arnold, Cohen, & Warner, 2009;Horwitz, 1996;Kals, Schumacher, & Montada, 1999;Kempton & Holland, 2003;Vadala, Bixler, & James, 2007). However, Holmes (2003) suggests that we need to expand the range of research participants to incorporate a wider range of socioeconomic and cultural diversity, rather than focusing specifically on environmentalist participants, in order to determine how nature experiences are affecting various populations.…”